The document.

Unauthorized. The API token is missing or invalid, the user is not active, or the organization does not have API access.

Payment required. The organization is locked for an overdue invoice.

Forbidden. A required parameter is missing or a parameter is invalid (wrong type, value outside the allowed range, per_page above the maximum, bad date filter), or the path is not a valid endpoint.

Not found. The record does not exist or your user cannot access it.

Too many requests. The rate limit (100 requests per minute per user by default) was exceeded. Check the X-Rate-Limit-Limit, X-Rate-Limit-Remaining and X-Rate-Limit-Reset headers, which are sent on every response.